研究反應堆 yán jiū fǎn yìng duī

DEFINITIONS

  1. research reactor

CHARACTERS

研 yán
HSK 4
grind, rub; study, research
究 jiū
HSK 4
examine, investigate
反 fǎn
HSK 4
reverse, opposite, contrary, anti
應 yìng should, ought to, must
堆 duī
HSK 5
heap, pile, crowd; pile up